Giraffe observations of CoRoT variable stars

Details Giraffe observations of CoRoT variable stars Giraffe observations of CoRoT variable stars

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sf2a.conf..291s&link_type=abstract

SF2A-2009: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, held 29 June - 4 July 2009 in

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present preliminary results from the ground-based ESO/GIRAFFE observational program set up for the spectroscopic study of variable stars observed in the CoRoT exoplanet fields. About 3000 variable stars have been identified in each CoRoT field by the CVC (CoRoT Variable Classifier). The multi-object GIRAFFE medium resolution spectroscopic observation of these fields allows us to accurately classify the variable stars in various types of pulsators, binaries, etc. In addition, our team identifies the Be stars to determine their fundamental parameters thanks to synthetic spectral fitting taking NLTE and rapid rotation effects into account. We will then test for correlations between the stellar parameters and pulsation properties of Be stars in a statistical way and study their instability strip. Moreover, knowing the fundamental parameters of the stars is necessary to perform seismic modeling.

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